Materials / Adhesives / Coatings

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New technology offers improved fluid-handling capacity and strong, skin-friendly adhesion for direct-contact wound treatment, stoma care, and other applications.

An aging population and accompanying demand for wound dressing and stoma care technologies that provide better treatment than conventional techniques have prompted the medical adhesives industry to produce a new generation of product solutions. One recently proven technology is a highly breathable formulation with superior fluid-handling capacity called Avery Dennison® Thin Absorbent Skin Adhesive, which is poised to shift current market expectations of conventional acrylic adhesives.
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Anomet Products (Shrewsbury, MA) offers custom manufactured clad composite wire in 0.002" to 0.060" O.D. sizes with 2% or more cladding thickness. This wire allows for the combination of one or more precious metals and a core material into a single wire with the desired OEM properties. For example, a radiopaque wire can feature platinum and platinum-iridium, tantalum and tantalum-tungsten, and similar alloys in clad composite with 316LVM stainless steel, nitinol, and MP35N®.
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Henkel (Dusseldorf, Germany) has developed the LOCTITE AssureCure system, designed to detect, measure, analyze, record, and provide a degree of cure metric relative to the transition of specially formulated adhesives from a liquid to a solid (Cured). The system includes new adhesive technology, fiber optic light sources, light detector unit, and software that ties into the user’s PC or PLC. Results can be displayed numerically, corresponding to the degree of cure, or as a pass/fail measurement. For medical device applications, LOCTITE AssureCure adhesives meet ISO 10993 biocompatibility requirements.

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3D printers have the potential to quickly produce complex structures and materials — including bone scaffolds, if Washington State University scientists have their way. An interdisciplinary team of chemistry, materials science, biology, and manufacturing researchers produced a bone-like material using a 3D printer.

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Among other advantages, a new resin offers an attractive option for manufacturers seeking to move toward animal-derivative-free materials.

Material selection plays an important role in the design of a medical device or bioprocessing system. It can improve end-user satisfaction, product reliability, and manufacturability of the device, as well as simplify the 510(k) application process. Various certifications such as animal-derivative-free, USP Class VI, and ISO 10993-5 are just a few of those desired by medical device manufacturers and biopharmaceutical companies. As a result, Value Plastics, a Nordson company, has chosen to mold a large variety of its connectors with a new polypropylene resin in order to better fulfill customer needs and expectations. This material, manufactured by Flint Hills Resources, is represented by part numbers ending in “-6005.” This technical brief will explain the multiple benefits to manufacturers who incorporate this resin into their end products.

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Argotec (Greenfield, MA) has introduced ArgoMedPLUS 18411, a thermoplastic polyurethane (TPU) film-on-paper product that provides a controlled release between the paper carrier and the TPU film. It can be extruded in film thicknesses ranging from 0.8 to 1.2 mils (20 to 30 microns), in widths up to 60 inches (1.52 meters), and lengths up to 550 non-spliced yards (532 meters), depending on film thickness.
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Foster Corporation (Putnam, CT) has introduced the NanoMed™ EX compounds with greater stiffness and without reduction in elongation, compared to the Pebax 7233 MED. The compounds are designed to bridge the gap between the Pebax TPE resin and nylon 11 in flexural modulus, a key property for cardiovascular and neurovascular catheters. They are also designed for catheter extrusion processing, where small diameters, thin walls, tight tolerances, and smooth surfaces are required.
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